Peter Sullivan

Clean Code

What Is Dependency Injection?

Replace Array With Object

Introduce Null Object

Introduce Assertion

Extract Class

Replace Magic Number With Symbolic Constant

Replace Constructor With Factory Method

Extract Superclass

Push Down Method

Inline Class

Replace Parameter With Explicit Methods

Change Reference To Value

Change Value To Reference

Inline Method

Replace Type Code With Class

Replace Error Code With Exception

Consolidate Conditional Expression

Split Temporary Variable

Form Template Method

Replace Subclass With Fields

Replace Exception With Test